-
1500
-
1400
-
1300
-
1200
-
1100
-
1000
-
900
-
800
-
700
-
600
-
500
-
400
-
300
-
200
-
100
0
100 200 300 400 500 600 700 800 900
1000 1100 1200 1300 1400 1500
Channel Gain Match (ppm)
100
90
80
70
60
50
40
30
20
10
0
NumberofOccurrences
High-Speed Mode
10 Units
-
1500
-
1400
-
1300
-
1200
-
1100
-
1000
-
900
-
800
-
700
-
600
-
500
-
400
-
300
-
200
-
100
0
100 200 300 400 500 600 700 800 900
1000 1100 1200 1300 1400 1500
Channel Offset Match ( V)
m
70
60
50
40
30
20
10
0
NumberofOccurrences
High-Speed Mode
10 Units
-
40
-
20
0
20
40
60
80
100
Temperature ( C)
°
100
50
0
-
50
-
100
-
150
-
200
-
250
-
300
NormalizedOf
fset(
V)
m
300
250
200
150
100
50
0
-
50
-
100
NormalizedGainError(ppm)
120 125
Offset
Gain
2.40
2.41
2.42
2.43
2.44
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
2.56
2.57
2.58
2.59
2.60
VCOM Voltage Output (V)
20
18
16
14
12
10
8
6
4
2
0
NumberofOccurrences
AVDD = 5V
25 Units, No Load
-
40
-
20
0
20
40
60
80
100
Temperature (
°
C)
1.36
1.34
1.32
1.30
1.28
1.26
1.24
1.22
ReferenceInputImpedance(k
)
W
13.6
13.4
13.2
13.0
12.8
12.6
12.4
12.2
ReferenceInputImpedance(k
)
W
120 125
High-Speed and
High-Resolution Modes
Low-Speed Mode
50
100
150
200
250
300
350
400
450
500
550
600
650
700
Sampling Match Error (ps)
40
35
30
25
20
15
10
5
0
NumberofOccurrences
30 units over 3 production lots,
inter-channel combinations.
ADS1278
ADS1274
ADS1278
SBAS367F
–
JUNE 2007
–
REVISED FEBRUARY 2011
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25
°
C, High-Speed mode, AVDD = +5V, DVDD = +1.8V, IOVDD = +3.3V, f
CLK
= 27MHz, VREFP = 2.5V, and
VREFN = 0V, unless otherwise noted.
CHANNEL GAIN MATCH HISTOGRAM
CHANNEL OFFSET MATCH HISTOGRAM
Figure 31.
Figure 32.
OFFSET AND GAIN
vs TEMPERATURE
VCOM VOLTAGE OUTPUT HISTOGRAM
Figure 33.
Figure 34.
ADS1274/ADS1278
ADS1274 REFERENCE INPUT DIFFERENTIAL
SAMPLING MATCH ERROR HISTOGRAM
IMPEDANCE vs TEMPERATURE
Figure 35.
Figure 36.
©
2007
–
2011, Texas Instruments Incorporated
15
Product Folder Link(s):